drivers/net/ethernet/ibm/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs = 1;
  65 static int prop_carrier_state;
  66
  67 module_param(msg_level, int, 0);
  68 module_param(rq1_entries, int, 0);
  69 module_param(rq2_entries, int, 0);
  70 module_param(rq3_entries, int, 0);
  71 module_param(sq_entries, int, 0);
  72 module_param(prop_carrier_state, int, 0);
  73 module_param(use_mcs, int, 0);
  74
  75 MODULE_PARM_DESC(msg_level, "msg_level");
  76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  77                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  79                  "[2^x - 1], x = [6..14]. Default = "
  80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  90 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  91                  "Default = 1");
  92
  93 static int port_name_cnt;
  94 static LIST_HEAD(adapter_list);
  95 static unsigned long ehea_driver_flags;
  96 static DEFINE_MUTEX(dlpar_mem_lock);
  97 static struct ehea_fw_handle_array ehea_fw_handles;
  98 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  99
 100
 101 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 102                                         const struct of_device_id *id);
 103
 104 static int __devexit ehea_remove(struct platform_device *dev);
 105
 106 static struct of_device_id ehea_module_device_table[] = {
 107         {
 108                 .name = "lhea",
 109                 .compatible = "IBM,lhea",
 110         },
 111         {
 112                 .type = "network",
 113                 .compatible = "IBM,lhea-ethernet",
 114         },
 115         {},
 116 };
 117 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 118
 119 static struct of_device_id ehea_device_table[] = {
 120         {
 121                 .name = "lhea",
 122                 .compatible = "IBM,lhea",
 123         },
 124         {},
 125 };
 126
 127 static struct of_platform_driver ehea_driver = {
 128         .driver = {
 129                 .name = "ehea",
 130                 .owner = THIS_MODULE,
 131                 .of_match_table = ehea_device_table,
 132         },
 133         .probe = ehea_probe_adapter,
 134         .remove = ehea_remove,
 135 };
 136
 137 void ehea_dump(void *adr, int len, char *msg)
 138 {
 139         int x;
 140         unsigned char *deb = adr;
 141         for (x = 0; x < len; x += 16) {
 142                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 143                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 144                 deb += 16;
 145         }
 146 }
 147
 148 static void ehea_schedule_port_reset(struct ehea_port *port)
 149 {
 150         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 151                 schedule_work(&port->reset_task);
 152 }
 153
 154 static void ehea_update_firmware_handles(void)
 155 {
 156         struct ehea_fw_handle_entry *arr = NULL;
 157         struct ehea_adapter *adapter;
 158         int num_adapters = 0;
 159         int num_ports = 0;
 160         int num_portres = 0;
 161         int i = 0;
 162         int num_fw_handles, k, l;
 163
 164         /* Determine number of handles */
 165         mutex_lock(&ehea_fw_handles.lock);
 166
 167         list_for_each_entry(adapter, &adapter_list, list) {
 168                 num_adapters++;
 169
 170                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 171                         struct ehea_port *port = adapter->port[k];
 172
 173                         if (!port || (port->state != EHEA_PORT_UP))
 174                                 continue;
 175
 176                         num_ports++;
 177                         num_portres += port->num_def_qps;
 178                 }
 179         }
 180
 181         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 182                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 183                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 184
 185         if (num_fw_handles) {
 186                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 187                 if (!arr)
 188                         goto out;  /* Keep the existing array */
 189         } else
 190                 goto out_update;
 191
 192         list_for_each_entry(adapter, &adapter_list, list) {
 193                 if (num_adapters == 0)
 194                         break;
 195
 196                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 197                         struct ehea_port *port = adapter->port[k];
 198
 199                         if (!port || (port->state != EHEA_PORT_UP) ||
 200                             (num_ports == 0))
 201                                 continue;
 202
 203                         for (l = 0; l < port->num_def_qps; l++) {
 204                                 struct ehea_port_res *pr = &port->port_res[l];
 205
 206                                 arr[i].adh = adapter->handle;
 207                                 arr[i++].fwh = pr->qp->fw_handle;
 208                                 arr[i].adh = adapter->handle;
 209                                 arr[i++].fwh = pr->send_cq->fw_handle;
 210                                 arr[i].adh = adapter->handle;
 211                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 212                                 arr[i].adh = adapter->handle;
 213                                 arr[i++].fwh = pr->eq->fw_handle;
 214                                 arr[i].adh = adapter->handle;
 215                                 arr[i++].fwh = pr->send_mr.handle;
 216                                 arr[i].adh = adapter->handle;
 217                                 arr[i++].fwh = pr->recv_mr.handle;
 218                         }
 219                         arr[i].adh = adapter->handle;
 220                         arr[i++].fwh = port->qp_eq->fw_handle;
 221                         num_ports--;
 222                 }
 223
 224                 arr[i].adh = adapter->handle;
 225                 arr[i++].fwh = adapter->neq->fw_handle;
 226
 227                 if (adapter->mr.handle) {
 228                         arr[i].adh = adapter->handle;
 229                         arr[i++].fwh = adapter->mr.handle;
 230                 }
 231                 num_adapters--;
 232         }
 233
 234 out_update:
 235         kfree(ehea_fw_handles.arr);
 236         ehea_fw_handles.arr = arr;
 237         ehea_fw_handles.num_entries = i;
 238 out:
 239         mutex_unlock(&ehea_fw_handles.lock);
 240 }
 241
 242 static void ehea_update_bcmc_registrations(void)
 243 {
 244         unsigned long flags;
 245         struct ehea_bcmc_reg_entry *arr = NULL;
 246         struct ehea_adapter *adapter;
 247         struct ehea_mc_list *mc_entry;
 248         int num_registrations = 0;
 249         int i = 0;
 250         int k;
 251
 252         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 253
 254         /* Determine number of registrations */
 255         list_for_each_entry(adapter, &adapter_list, list)
 256                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 257                         struct ehea_port *port = adapter->port[k];
 258
 259                         if (!port || (port->state != EHEA_PORT_UP))
 260                                 continue;
 261
 262                         num_registrations += 2; /* Broadcast registrations */
 263
 264                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 265                                 num_registrations += 2;
 266                 }
 267
 268         if (num_registrations) {
 269                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 270                 if (!arr)
 271                         goto out;  /* Keep the existing array */
 272         } else
 273                 goto out_update;
 274
 275         list_for_each_entry(adapter, &adapter_list, list) {
 276                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 277                         struct ehea_port *port = adapter->port[k];
 278
 279                         if (!port || (port->state != EHEA_PORT_UP))
 280                                 continue;
 281
 282                         if (num_registrations == 0)
 283                                 goto out_update;
 284
 285                         arr[i].adh = adapter->handle;
 286                         arr[i].port_id = port->logical_port_id;
 287                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 288                                           EHEA_BCMC_UNTAGGED;
 289                         arr[i++].macaddr = port->mac_addr;
 290
 291                         arr[i].adh = adapter->handle;
 292                         arr[i].port_id = port->logical_port_id;
 293                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 294                                           EHEA_BCMC_VLANID_ALL;
 295                         arr[i++].macaddr = port->mac_addr;
 296                         num_registrations -= 2;
 297
 298                         list_for_each_entry(mc_entry,
 299                                             &port->mc_list->list, list) {
 300                                 if (num_registrations == 0)
 301                                         goto out_update;
 302
 303                                 arr[i].adh = adapter->handle;
 304                                 arr[i].port_id = port->logical_port_id;
 305                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 306                                                   EHEA_BCMC_UNTAGGED;
 307                                 if (mc_entry->macaddr == 0)
 308                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 309                                 arr[i++].macaddr = mc_entry->macaddr;
 310
 311                                 arr[i].adh = adapter->handle;
 312                                 arr[i].port_id = port->logical_port_id;
 313                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 314                                                   EHEA_BCMC_VLANID_ALL;
 315                                 if (mc_entry->macaddr == 0)
 316                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 317                                 arr[i++].macaddr = mc_entry->macaddr;
 318                                 num_registrations -= 2;
 319                         }
 320                 }
 321         }
 322
 323 out_update:
 324         kfree(ehea_bcmc_regs.arr);
 325         ehea_bcmc_regs.arr = arr;
 326         ehea_bcmc_regs.num_entries = i;
 327 out:
 328         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 329 }
 330
 331 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 332                                         struct rtnl_link_stats64 *stats)
 333 {
 334         struct ehea_port *port = netdev_priv(dev);
 335         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 336         int i;
 337
 338         for (i = 0; i < port->num_def_qps; i++) {
 339                 rx_packets += port->port_res[i].rx_packets;
 340                 rx_bytes   += port->port_res[i].rx_bytes;
 341         }
 342
 343         for (i = 0; i < port->num_def_qps; i++) {
 344                 tx_packets += port->port_res[i].tx_packets;
 345                 tx_bytes   += port->port_res[i].tx_bytes;
 346         }
 347
 348         stats->tx_packets = tx_packets;
 349         stats->rx_bytes = rx_bytes;
 350         stats->tx_bytes = tx_bytes;
 351         stats->rx_packets = rx_packets;
 352
 353         stats->multicast = port->stats.multicast;
 354         stats->rx_errors = port->stats.rx_errors;
 355         return stats;
 356 }
 357
 358 static void ehea_update_stats(struct work_struct *work)
 359 {
 360         struct ehea_port *port =
 361                 container_of(work, struct ehea_port, stats_work.work);
 362         struct net_device *dev = port->netdev;
 363         struct rtnl_link_stats64 *stats = &port->stats;
 364         struct hcp_ehea_port_cb2 *cb2;
 365         u64 hret;
 366
 367         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 368         if (!cb2) {
 369                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 370                 goto resched;
 371         }
 372
 373         hret = ehea_h_query_ehea_port(port->adapter->handle,
 374                                       port->logical_port_id,
 375                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 376         if (hret != H_SUCCESS) {
 377                 netdev_err(dev, "query_ehea_port failed\n");
 378                 goto out_herr;
 379         }
 380
 381         if (netif_msg_hw(port))
 382                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 383
 384         stats->multicast = cb2->rxmcp;
 385         stats->rx_errors = cb2->rxuerr;
 386
 387 out_herr:
 388         free_page((unsigned long)cb2);
 389 resched:
 390         schedule_delayed_work(&port->stats_work,
 391                               round_jiffies_relative(msecs_to_jiffies(1000)));
 392 }
 393
 394 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 395 {
 396         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 397         struct net_device *dev = pr->port->netdev;
 398         int max_index_mask = pr->rq1_skba.len - 1;
 399         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 400         int adder = 0;
 401         int i;
 402
 403         pr->rq1_skba.os_skbs = 0;
 404
 405         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 406                 if (nr_of_wqes > 0)
 407                         pr->rq1_skba.index = index;
 408                 pr->rq1_skba.os_skbs = fill_wqes;
 409                 return;
 410         }
 411
 412         for (i = 0; i < fill_wqes; i++) {
 413                 if (!skb_arr_rq1[index]) {
 414                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 415                                                               EHEA_L_PKT_SIZE);
 416                         if (!skb_arr_rq1[index]) {
 417                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 418                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 419                                 break;
 420                         }
 421                 }
 422                 index--;
 423                 index &= max_index_mask;
 424                 adder++;
 425         }
 426
 427         if (adder == 0)
 428                 return;
 429
 430         /* Ring doorbell */
 431         ehea_update_rq1a(pr->qp, adder);
 432 }
 433
 434 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 435 {
 436         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 437         struct net_device *dev = pr->port->netdev;
 438         int i;
 439
 440         if (nr_rq1a > pr->rq1_skba.len) {
 441                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 442                 return;
 443         }
 444
 445         for (i = 0; i < nr_rq1a; i++) {
 446                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 447                 if (!skb_arr_rq1[i]) {
 448                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 449                         break;
 450                 }
 451         }
 452         /* Ring doorbell */
 453         ehea_update_rq1a(pr->qp, i - 1);
 454 }
 455
 456 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 457                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 458                               int num_wqes, int wqe_type, int packet_size)
 459 {
 460         struct net_device *dev = pr->port->netdev;
 461         struct ehea_qp *qp = pr->qp;
 462         struct sk_buff **skb_arr = q_skba->arr;
 463         struct ehea_rwqe *rwqe;
 464         int i, index, max_index_mask, fill_wqes;
 465         int adder = 0;
 466         int ret = 0;
 467
 468         fill_wqes = q_skba->os_skbs + num_wqes;
 469         q_skba->os_skbs = 0;
 470
 471         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 472                 q_skba->os_skbs = fill_wqes;
 473                 return ret;
 474         }
 475
 476         index = q_skba->index;
 477         max_index_mask = q_skba->len - 1;
 478         for (i = 0; i < fill_wqes; i++) {
 479                 u64 tmp_addr;
 480                 struct sk_buff *skb;
 481
 482                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 483                 if (!skb) {
 484                         q_skba->os_skbs = fill_wqes - i;
 485                         if (q_skba->os_skbs == q_skba->len - 2) {
 486                                 netdev_info(pr->port->netdev,
 487                                             "rq%i ran dry - no mem for skb\n",
 488                                             rq_nr);
 489                                 ret = -ENOMEM;
 490                         }
 491                         break;
 492                 }
 493
 494                 skb_arr[index] = skb;
 495                 tmp_addr = ehea_map_vaddr(skb->data);
 496                 if (tmp_addr == -1) {
 497                         dev_kfree_skb(skb);
 498                         q_skba->os_skbs = fill_wqes - i;
 499                         ret = 0;
 500                         break;
 501                 }
 502
 503                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 504                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 505                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 506                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 507                 rwqe->sg_list[0].vaddr = tmp_addr;
 508                 rwqe->sg_list[0].len = packet_size;
 509                 rwqe->data_segments = 1;
 510
 511                 index++;
 512                 index &= max_index_mask;
 513                 adder++;
 514         }
 515
 516         q_skba->index = index;
 517         if (adder == 0)
 518                 goto out;
 519
 520         /* Ring doorbell */
 521         iosync();
 522         if (rq_nr == 2)
 523                 ehea_update_rq2a(pr->qp, adder);
 524         else
 525                 ehea_update_rq3a(pr->qp, adder);
 526 out:
 527         return ret;
 528 }
 529
 530
 531 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 532 {
 533         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 534                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 535                                   EHEA_RQ2_PKT_SIZE);
 536 }
 537
 538
 539 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 540 {
 541         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 542                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 543                                   EHEA_MAX_PACKET_SIZE);
 544 }
 545
 546 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 547 {
 548         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 549         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 550                 return 0;
 551         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 552             (cqe->header_length == 0))
 553                 return 0;
 554         return -EINVAL;
 555 }
 556
 557 static inline void ehea_fill_skb(struct net_device *dev,
 558                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 559                                  struct ehea_port_res *pr)
 560 {
 561         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 562
 563         skb_put(skb, length);
 564         skb->protocol = eth_type_trans(skb, dev);
 565
 566         /* The packet was not an IPV4 packet so a complemented checksum was
 567            calculated. The value is found in the Internet Checksum field. */
 568         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 569                 skb->ip_summed = CHECKSUM_COMPLETE;
 570                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 571         } else
 572                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 573
 574         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 575 }
 576
 577 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 578                                                int arr_len,
 579                                                struct ehea_cqe *cqe)
 580 {
 581         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 582         struct sk_buff *skb;
 583         void *pref;
 584         int x;
 585
 586         x = skb_index + 1;
 587         x &= (arr_len - 1);
 588
 589         pref = skb_array[x];
 590         if (pref) {
 591                 prefetchw(pref);
 592                 prefetchw(pref + EHEA_CACHE_LINE);
 593
 594                 pref = (skb_array[x]->data);
 595                 prefetch(pref);
 596                 prefetch(pref + EHEA_CACHE_LINE);
 597                 prefetch(pref + EHEA_CACHE_LINE * 2);
 598                 prefetch(pref + EHEA_CACHE_LINE * 3);
 599         }
 600
 601         skb = skb_array[skb_index];
 602         skb_array[skb_index] = NULL;
 603         return skb;
 604 }
 605
 606 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 607                                                   int arr_len, int wqe_index)
 608 {
 609         struct sk_buff *skb;
 610         void *pref;
 611         int x;
 612
 613         x = wqe_index + 1;
 614         x &= (arr_len - 1);
 615
 616         pref = skb_array[x];
 617         if (pref) {
 618                 prefetchw(pref);
 619                 prefetchw(pref + EHEA_CACHE_LINE);
 620
 621                 pref = (skb_array[x]->data);
 622                 prefetchw(pref);
 623                 prefetchw(pref + EHEA_CACHE_LINE);
 624         }
 625
 626         skb = skb_array[wqe_index];
 627         skb_array[wqe_index] = NULL;
 628         return skb;
 629 }
 630
 631 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 632                                  struct ehea_cqe *cqe, int *processed_rq2,
 633                                  int *processed_rq3)
 634 {
 635         struct sk_buff *skb;
 636
 637         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 638                 pr->p_stats.err_tcp_cksum++;
 639         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 640                 pr->p_stats.err_ip_cksum++;
 641         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 642                 pr->p_stats.err_frame_crc++;
 643
 644         if (rq == 2) {
 645                 *processed_rq2 += 1;
 646                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 647                 dev_kfree_skb(skb);
 648         } else if (rq == 3) {
 649                 *processed_rq3 += 1;
 650                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 651                 dev_kfree_skb(skb);
 652         }
 653
 654         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 655                 if (netif_msg_rx_err(pr->port)) {
 656                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 657                                pr->qp->init_attr.qp_nr);
 658                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 659                 }
 660                 ehea_schedule_port_reset(pr->port);
 661                 return 1;
 662         }
 663
 664         return 0;
 665 }
 666
 667 static int ehea_proc_rwqes(struct net_device *dev,
 668                            struct ehea_port_res *pr,
 669                            int budget)
 670 {
 671         struct ehea_port *port = pr->port;
 672         struct ehea_qp *qp = pr->qp;
 673         struct ehea_cqe *cqe;
 674         struct sk_buff *skb;
 675         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 676         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 677         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 678         int skb_arr_rq1_len = pr->rq1_skba.len;
 679         int skb_arr_rq2_len = pr->rq2_skba.len;
 680         int skb_arr_rq3_len = pr->rq3_skba.len;
 681         int processed, processed_rq1, processed_rq2, processed_rq3;
 682         u64 processed_bytes = 0;
 683         int wqe_index, last_wqe_index, rq, port_reset;
 684
 685         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 686         last_wqe_index = 0;
 687
 688         cqe = ehea_poll_rq1(qp, &wqe_index);
 689         while ((processed < budget) && cqe) {
 690                 ehea_inc_rq1(qp);
 691                 processed_rq1++;
 692                 processed++;
 693                 if (netif_msg_rx_status(port))
 694                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 695
 696                 last_wqe_index = wqe_index;
 697                 rmb();
 698                 if (!ehea_check_cqe(cqe, &rq)) {
 699                         if (rq == 1) {
 700                                 /* LL RQ1 */
 701                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 702                                                           skb_arr_rq1_len,
 703                                                           wqe_index);
 704                                 if (unlikely(!skb)) {
 705                                         netif_info(port, rx_err, dev,
 706                                                   "LL rq1: skb=NULL\n");
 707
 708                                         skb = netdev_alloc_skb(dev,
 709                                                                EHEA_L_PKT_SIZE);
 710                                         if (!skb) {
 711                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 712                                                 break;
 713                                         }
 714                                 }
 715                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 716                                                  cqe->num_bytes_transfered - 4);
 717                                 ehea_fill_skb(dev, skb, cqe, pr);
 718                         } else if (rq == 2) {
 719                                 /* RQ2 */
 720                                 skb = get_skb_by_index(skb_arr_rq2,
 721                                                        skb_arr_rq2_len, cqe);
 722                                 if (unlikely(!skb)) {
 723                                         netif_err(port, rx_err, dev,
 724                                                   "rq2: skb=NULL\n");
 725                                         break;
 726                                 }
 727                                 ehea_fill_skb(dev, skb, cqe, pr);
 728                                 processed_rq2++;
 729                         } else {
 730                                 /* RQ3 */
 731                                 skb = get_skb_by_index(skb_arr_rq3,
 732                                                        skb_arr_rq3_len, cqe);
 733                                 if (unlikely(!skb)) {
 734                                         netif_err(port, rx_err, dev,
 735                                                   "rq3: skb=NULL\n");
 736                                         break;
 737                                 }
 738                                 ehea_fill_skb(dev, skb, cqe, pr);
 739                                 processed_rq3++;
 740                         }
 741
 742                         processed_bytes += skb->len;
 743
 744                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 745                                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 746
 747                         napi_gro_receive(&pr->napi, skb);
 748                 } else {
 749                         pr->p_stats.poll_receive_errors++;
 750                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 751                                                            &processed_rq2,
 752                                                            &processed_rq3);
 753                         if (port_reset)
 754                                 break;
 755                 }
 756                 cqe = ehea_poll_rq1(qp, &wqe_index);
 757         }
 758
 759         pr->rx_packets += processed;
 760         pr->rx_bytes += processed_bytes;
 761
 762         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 763         ehea_refill_rq2(pr, processed_rq2);
 764         ehea_refill_rq3(pr, processed_rq3);
 765
 766         return processed;
 767 }
 768
 769 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 770
 771 static void reset_sq_restart_flag(struct ehea_port *port)
 772 {
 773         int i;
 774
 775         for (i = 0; i < port->num_def_qps; i++) {
 776                 struct ehea_port_res *pr = &port->port_res[i];
 777                 pr->sq_restart_flag = 0;
 778         }
 779         wake_up(&port->restart_wq);
 780 }
 781
 782 static void check_sqs(struct ehea_port *port)
 783 {
 784         struct ehea_swqe *swqe;
 785         int swqe_index;
 786         int i, k;
 787
 788         for (i = 0; i < port->num_def_qps; i++) {
 789                 struct ehea_port_res *pr = &port->port_res[i];
 790                 int ret;
 791                 k = 0;
 792                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 793                 memset(swqe, 0, SWQE_HEADER_SIZE);
 794                 atomic_dec(&pr->swqe_avail);
 795
 796                 swqe->tx_control |= EHEA_SWQE_PURGE;
 797                 swqe->wr_id = SWQE_RESTART_CHECK;
 798                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 799                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 800                 swqe->immediate_data_length = 80;
 801
 802                 ehea_post_swqe(pr->qp, swqe);
 803
 804                 ret = wait_event_timeout(port->restart_wq,
 805                                          pr->sq_restart_flag == 0,
 806                                          msecs_to_jiffies(100));
 807
 808                 if (!ret) {
 809                         pr_err("HW/SW queues out of sync\n");
 810                         ehea_schedule_port_reset(pr->port);
 811                         return;
 812                 }
 813         }
 814 }
 815
 816
 817 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 818 {
 819         struct sk_buff *skb;
 820         struct ehea_cq *send_cq = pr->send_cq;
 821         struct ehea_cqe *cqe;
 822         int quota = my_quota;
 823         int cqe_counter = 0;
 824         int swqe_av = 0;
 825         int index;
 826         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 827                                                 pr - &pr->port->port_res[0]);
 828
 829         cqe = ehea_poll_cq(send_cq);
 830         while (cqe && (quota > 0)) {
 831                 ehea_inc_cq(send_cq);
 832
 833                 cqe_counter++;
 834                 rmb();
 835
 836                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 837                         pr->sq_restart_flag = 1;
 838                         swqe_av++;
 839                         break;
 840                 }
 841
 842                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 843                         pr_err("Bad send completion status=0x%04X\n",
 844                                cqe->status);
 845
 846                         if (netif_msg_tx_err(pr->port))
 847                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 848
 849                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 850                                 pr_err("Resetting port\n");
 851                                 ehea_schedule_port_reset(pr->port);
 852                                 break;
 853                         }
 854                 }
 855
 856                 if (netif_msg_tx_done(pr->port))
 857                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 858
 859                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 860                            == EHEA_SWQE2_TYPE)) {
 861
 862                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 863                         skb = pr->sq_skba.arr[index];
 864                         dev_kfree_skb(skb);
 865                         pr->sq_skba.arr[index] = NULL;
 866                 }
 867
 868                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 869                 quota--;
 870
 871                 cqe = ehea_poll_cq(send_cq);
 872         }
 873
 874         ehea_update_feca(send_cq, cqe_counter);
 875         atomic_add(swqe_av, &pr->swqe_avail);
 876
 877         if (unlikely(netif_tx_queue_stopped(txq) &&
 878                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 879                 __netif_tx_lock(txq, smp_processor_id());
 880                 if (netif_tx_queue_stopped(txq) &&
 881                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 882                         netif_tx_wake_queue(txq);
 883                 __netif_tx_unlock(txq);
 884         }
 885
 886         wake_up(&pr->port->swqe_avail_wq);
 887
 888         return cqe;
 889 }
 890
 891 #define EHEA_POLL_MAX_CQES 65535
 892
 893 static int ehea_poll(struct napi_struct *napi, int budget)
 894 {
 895         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 896                                                 napi);
 897         struct net_device *dev = pr->port->netdev;
 898         struct ehea_cqe *cqe;
 899         struct ehea_cqe *cqe_skb = NULL;
 900         int wqe_index;
 901         int rx = 0;
 902
 903         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 904         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 905
 906         while (rx != budget) {
 907                 napi_complete(napi);
 908                 ehea_reset_cq_ep(pr->recv_cq);
 909                 ehea_reset_cq_ep(pr->send_cq);
 910                 ehea_reset_cq_n1(pr->recv_cq);
 911                 ehea_reset_cq_n1(pr->send_cq);
 912                 rmb();
 913                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 914                 cqe_skb = ehea_poll_cq(pr->send_cq);
 915
 916                 if (!cqe && !cqe_skb)
 917                         return rx;
 918
 919                 if (!napi_reschedule(napi))
 920                         return rx;
 921
 922                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 923                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 924         }
 925
 926         return rx;
 927 }
 928
 929 #ifdef CONFIG_NET_POLL_CONTROLLER
 930 static void ehea_netpoll(struct net_device *dev)
 931 {
 932         struct ehea_port *port = netdev_priv(dev);
 933         int i;
 934
 935         for (i = 0; i < port->num_def_qps; i++)
 936                 napi_schedule(&port->port_res[i].napi);
 937 }
 938 #endif
 939
 940 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 941 {
 942         struct ehea_port_res *pr = param;
 943
 944         napi_schedule(&pr->napi);
 945
 946         return IRQ_HANDLED;
 947 }
 948
 949 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 950 {
 951         struct ehea_port *port = param;
 952         struct ehea_eqe *eqe;
 953         struct ehea_qp *qp;
 954         u32 qp_token;
 955         u64 resource_type, aer, aerr;
 956         int reset_port = 0;
 957
 958         eqe = ehea_poll_eq(port->qp_eq);
 959
 960         while (eqe) {
 961                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 962                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 963                        eqe->entry, qp_token);
 964
 965                 qp = port->port_res[qp_token].qp;
 966
 967                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 968                                                 &aer, &aerr);
 969
 970                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 971                         if ((aer & EHEA_AER_RESET_MASK) ||
 972                             (aerr & EHEA_AERR_RESET_MASK))
 973                                  reset_port = 1;
 974                 } else
 975                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 976
 977                 eqe = ehea_poll_eq(port->qp_eq);
 978         }
 979
 980         if (reset_port) {
 981                 pr_err("Resetting port\n");
 982                 ehea_schedule_port_reset(port);
 983         }
 984
 985         return IRQ_HANDLED;
 986 }
 987
 988 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 989                                        int logical_port)
 990 {
 991         int i;
 992
 993         for (i = 0; i < EHEA_MAX_PORTS; i++)
 994                 if (adapter->port[i])
 995                         if (adapter->port[i]->logical_port_id == logical_port)
 996                                 return adapter->port[i];
 997         return NULL;
 998 }
 999
1000 int ehea_sense_port_attr(struct ehea_port *port)
1001 {
1002         int ret;
1003         u64 hret;
1004         struct hcp_ehea_port_cb0 *cb0;
1005
1006         /* may be called via ehea_neq_tasklet() */
1007         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1008         if (!cb0) {
1009                 pr_err("no mem for cb0\n");
1010                 ret = -ENOMEM;
1011                 goto out;
1012         }
1013
1014         hret = ehea_h_query_ehea_port(port->adapter->handle,
1015                                       port->logical_port_id, H_PORT_CB0,
1016                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1017                                       cb0);
1018         if (hret != H_SUCCESS) {
1019                 ret = -EIO;
1020                 goto out_free;
1021         }
1022
1023         /* MAC address */
1024         port->mac_addr = cb0->port_mac_addr << 16;
1025
1026         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1027                 ret = -EADDRNOTAVAIL;
1028                 goto out_free;
1029         }
1030
1031         /* Port speed */
1032         switch (cb0->port_speed) {
1033         case H_SPEED_10M_H:
1034                 port->port_speed = EHEA_SPEED_10M;
1035                 port->full_duplex = 0;
1036                 break;
1037         case H_SPEED_10M_F:
1038                 port->port_speed = EHEA_SPEED_10M;
1039                 port->full_duplex = 1;
1040                 break;
1041         case H_SPEED_100M_H:
1042                 port->port_speed = EHEA_SPEED_100M;
1043                 port->full_duplex = 0;
1044                 break;
1045         case H_SPEED_100M_F:
1046                 port->port_speed = EHEA_SPEED_100M;
1047                 port->full_duplex = 1;
1048                 break;
1049         case H_SPEED_1G_F:
1050                 port->port_speed = EHEA_SPEED_1G;
1051                 port->full_duplex = 1;
1052                 break;
1053         case H_SPEED_10G_F:
1054                 port->port_speed = EHEA_SPEED_10G;
1055                 port->full_duplex = 1;
1056                 break;
1057         default:
1058                 port->port_speed = 0;
1059                 port->full_duplex = 0;
1060                 break;
1061         }
1062
1063         port->autoneg = 1;
1064         port->num_mcs = cb0->num_default_qps;
1065
1066         /* Number of default QPs */
1067         if (use_mcs)
1068                 port->num_def_qps = cb0->num_default_qps;
1069         else
1070                 port->num_def_qps = 1;
1071
1072         if (!port->num_def_qps) {
1073                 ret = -EINVAL;
1074                 goto out_free;
1075         }
1076
1077         ret = 0;
1078 out_free:
1079         if (ret || netif_msg_probe(port))
1080                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1081         free_page((unsigned long)cb0);
1082 out:
1083         return ret;
1084 }
1085
1086 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1087 {
1088         struct hcp_ehea_port_cb4 *cb4;
1089         u64 hret;
1090         int ret = 0;
1091
1092         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1093         if (!cb4) {
1094                 pr_err("no mem for cb4\n");
1095                 ret = -ENOMEM;
1096                 goto out;
1097         }
1098
1099         cb4->port_speed = port_speed;
1100
1101         netif_carrier_off(port->netdev);
1102
1103         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1104                                        port->logical_port_id,
1105                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1106         if (hret == H_SUCCESS) {
1107                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1108
1109                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1110                                               port->logical_port_id,
1111                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1112                                               cb4);
1113                 if (hret == H_SUCCESS) {
1114                         switch (cb4->port_speed) {
1115                         case H_SPEED_10M_H:
1116                                 port->port_speed = EHEA_SPEED_10M;
1117                                 port->full_duplex = 0;
1118                                 break;
1119                         case H_SPEED_10M_F:
1120                                 port->port_speed = EHEA_SPEED_10M;
1121                                 port->full_duplex = 1;
1122                                 break;
1123                         case H_SPEED_100M_H:
1124                                 port->port_speed = EHEA_SPEED_100M;
1125                                 port->full_duplex = 0;
1126                                 break;
1127                         case H_SPEED_100M_F:
1128                                 port->port_speed = EHEA_SPEED_100M;
1129                                 port->full_duplex = 1;
1130                                 break;
1131                         case H_SPEED_1G_F:
1132                                 port->port_speed = EHEA_SPEED_1G;
1133                                 port->full_duplex = 1;
1134                                 break;
1135                         case H_SPEED_10G_F:
1136                                 port->port_speed = EHEA_SPEED_10G;
1137                                 port->full_duplex = 1;
1138                                 break;
1139                         default:
1140                                 port->port_speed = 0;
1141                                 port->full_duplex = 0;
1142                                 break;
1143                         }
1144                 } else {
1145                         pr_err("Failed sensing port speed\n");
1146                         ret = -EIO;
1147                 }
1148         } else {
1149                 if (hret == H_AUTHORITY) {
1150                         pr_info("Hypervisor denied setting port speed\n");
1151                         ret = -EPERM;
1152                 } else {
1153                         ret = -EIO;
1154                         pr_err("Failed setting port speed\n");
1155                 }
1156         }
1157         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1158                 netif_carrier_on(port->netdev);
1159
1160         free_page((unsigned long)cb4);
1161 out:
1162         return ret;
1163 }
1164
1165 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1166 {
1167         int ret;
1168         u8 ec;
1169         u8 portnum;
1170         struct ehea_port *port;
1171         struct net_device *dev;
1172
1173         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1174         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1175         port = ehea_get_port(adapter, portnum);
1176         dev = port->netdev;
1177
1178         switch (ec) {
1179         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1180
1181                 if (!port) {
1182                         netdev_err(dev, "unknown portnum %x\n", portnum);
1183                         break;
1184                 }
1185
1186                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1187                         if (!netif_carrier_ok(dev)) {
1188                                 ret = ehea_sense_port_attr(port);
1189                                 if (ret) {
1190                                         netdev_err(dev, "failed resensing port attributes\n");
1191                                         break;
1192                                 }
1193
1194                                 netif_info(port, link, dev,
1195                                            "Logical port up: %dMbps %s Duplex\n",
1196                                            port->port_speed,
1197                                            port->full_duplex == 1 ?
1198                                            "Full" : "Half");
1199
1200                                 netif_carrier_on(dev);
1201                                 netif_wake_queue(dev);
1202                         }
1203                 } else
1204                         if (netif_carrier_ok(dev)) {
1205                                 netif_info(port, link, dev,
1206                                            "Logical port down\n");
1207                                 netif_carrier_off(dev);
1208                                 netif_tx_disable(dev);
1209                         }
1210
1211                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1212                         port->phy_link = EHEA_PHY_LINK_UP;
1213                         netif_info(port, link, dev,
1214                                    "Physical port up\n");
1215                         if (prop_carrier_state)
1216                                 netif_carrier_on(dev);
1217                 } else {
1218                         port->phy_link = EHEA_PHY_LINK_DOWN;
1219                         netif_info(port, link, dev,
1220                                    "Physical port down\n");
1221                         if (prop_carrier_state)
1222                                 netif_carrier_off(dev);
1223                 }
1224
1225                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1226                         netdev_info(dev,
1227                                     "External switch port is primary port\n");
1228                 else
1229                         netdev_info(dev,
1230                                     "External switch port is backup port\n");
1231
1232                 break;
1233         case EHEA_EC_ADAPTER_MALFUNC:
1234                 netdev_err(dev, "Adapter malfunction\n");
1235                 break;
1236         case EHEA_EC_PORT_MALFUNC:
1237                 netdev_info(dev, "Port malfunction\n");
1238                 netif_carrier_off(dev);
1239                 netif_tx_disable(dev);
1240                 break;
1241         default:
1242                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1243                 break;
1244         }
1245 }
1246
1247 static void ehea_neq_tasklet(unsigned long data)
1248 {
1249         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1250         struct ehea_eqe *eqe;
1251         u64 event_mask;
1252
1253         eqe = ehea_poll_eq(adapter->neq);
1254         pr_debug("eqe=%p\n", eqe);
1255
1256         while (eqe) {
1257                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1258                 ehea_parse_eqe(adapter, eqe->entry);
1259                 eqe = ehea_poll_eq(adapter->neq);
1260                 pr_debug("next eqe=%p\n", eqe);
1261         }
1262
1263         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1264                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1265                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1266
1267         ehea_h_reset_events(adapter->handle,
1268                             adapter->neq->fw_handle, event_mask);
1269 }
1270
1271 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1272 {
1273         struct ehea_adapter *adapter = param;
1274         tasklet_hi_schedule(&adapter->neq_tasklet);
1275         return IRQ_HANDLED;
1276 }
1277
1278
1279 static int ehea_fill_port_res(struct ehea_port_res *pr)
1280 {
1281         int ret;
1282         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1283
1284         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1285
1286         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1287
1288         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1289
1290         return ret;
1291 }
1292
1293 static int ehea_reg_interrupts(struct net_device *dev)
1294 {
1295         struct ehea_port *port = netdev_priv(dev);
1296         struct ehea_port_res *pr;
1297         int i, ret;
1298
1299
1300         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1301                  dev->name);
1302
1303         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1304                                   ehea_qp_aff_irq_handler,
1305                                   IRQF_DISABLED, port->int_aff_name, port);
1306         if (ret) {
1307                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1308                            port->qp_eq->attr.ist1);
1309                 goto out_free_qpeq;
1310         }
1311
1312         netif_info(port, ifup, dev,
1313                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1314                    port->qp_eq->attr.ist1);
1315
1316
1317         for (i = 0; i < port->num_def_qps; i++) {
1318                 pr = &port->port_res[i];
1319                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1320                          "%s-queue%d", dev->name, i);
1321                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1322                                           ehea_recv_irq_handler,
1323                                           IRQF_DISABLED, pr->int_send_name,
1324                                           pr);
1325                 if (ret) {
1326                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1327                                    i, pr->eq->attr.ist1);
1328                         goto out_free_req;
1329                 }
1330                 netif_info(port, ifup, dev,
1331                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1332                            pr->eq->attr.ist1, i);
1333         }
1334 out:
1335         return ret;
1336
1337
1338 out_free_req:
1339         while (--i >= 0) {
1340                 u32 ist = port->port_res[i].eq->attr.ist1;
1341                 ibmebus_free_irq(ist, &port->port_res[i]);
1342         }
1343
1344 out_free_qpeq:
1345         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1346         i = port->num_def_qps;
1347
1348         goto out;
1349
1350 }
1351
1352 static void ehea_free_interrupts(struct net_device *dev)
1353 {
1354         struct ehea_port *port = netdev_priv(dev);
1355         struct ehea_port_res *pr;
1356         int i;
1357
1358         /* send */
1359
1360         for (i = 0; i < port->num_def_qps; i++) {
1361                 pr = &port->port_res[i];
1362                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1363                 netif_info(port, intr, dev,
1364                            "free send irq for res %d with handle 0x%X\n",
1365                            i, pr->eq->attr.ist1);
1366         }
1367
1368         /* associated events */
1369         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1370         netif_info(port, intr, dev,
1371                    "associated event interrupt for handle 0x%X freed\n",
1372                    port->qp_eq->attr.ist1);
1373 }
1374
1375 static int ehea_configure_port(struct ehea_port *port)
1376 {
1377         int ret, i;
1378         u64 hret, mask;
1379         struct hcp_ehea_port_cb0 *cb0;
1380
1381         ret = -ENOMEM;
1382         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1383         if (!cb0)
1384                 goto out;
1385
1386         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1387                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1388                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1389                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1390                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1391                                       PXLY_RC_VLAN_FILTER)
1392                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1393
1394         for (i = 0; i < port->num_mcs; i++)
1395                 if (use_mcs)
1396                         cb0->default_qpn_arr[i] =
1397                                 port->port_res[i].qp->init_attr.qp_nr;
1398                 else
1399                         cb0->default_qpn_arr[i] =
1400                                 port->port_res[0].qp->init_attr.qp_nr;
1401
1402         if (netif_msg_ifup(port))
1403                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1404
1405         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1406              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1407
1408         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1409                                        port->logical_port_id,
1410                                        H_PORT_CB0, mask, cb0);
1411         ret = -EIO;
1412         if (hret != H_SUCCESS)
1413                 goto out_free;
1414
1415         ret = 0;
1416
1417 out_free:
1418         free_page((unsigned long)cb0);
1419 out:
1420         return ret;
1421 }
1422
1423 static int ehea_gen_smrs(struct ehea_port_res *pr)
1424 {
1425         int ret;
1426         struct ehea_adapter *adapter = pr->port->adapter;
1427
1428         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1429         if (ret)
1430                 goto out;
1431
1432         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1433         if (ret)
1434                 goto out_free;
1435
1436         return 0;
1437
1438 out_free:
1439         ehea_rem_mr(&pr->send_mr);
1440 out:
1441         pr_err("Generating SMRS failed\n");
1442         return -EIO;
1443 }
1444
1445 static int ehea_rem_smrs(struct ehea_port_res *pr)
1446 {
1447         if ((ehea_rem_mr(&pr->send_mr)) ||
1448             (ehea_rem_mr(&pr->recv_mr)))
1449                 return -EIO;
1450         else
1451                 return 0;
1452 }
1453
1454 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1455 {
1456         int arr_size = sizeof(void *) * max_q_entries;
1457
1458         q_skba->arr = vzalloc(arr_size);
1459         if (!q_skba->arr)
1460                 return -ENOMEM;
1461
1462         q_skba->len = max_q_entries;
1463         q_skba->index = 0;
1464         q_skba->os_skbs = 0;
1465
1466         return 0;
1467 }
1468
1469 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1470                               struct port_res_cfg *pr_cfg, int queue_token)
1471 {
1472         struct ehea_adapter *adapter = port->adapter;
1473         enum ehea_eq_type eq_type = EHEA_EQ;
1474         struct ehea_qp_init_attr *init_attr = NULL;
1475         int ret = -EIO;
1476         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1477
1478         tx_bytes = pr->tx_bytes;
1479         tx_packets = pr->tx_packets;
1480         rx_bytes = pr->rx_bytes;
1481         rx_packets = pr->rx_packets;
1482
1483         memset(pr, 0, sizeof(struct ehea_port_res));
1484
1485         pr->tx_bytes = rx_bytes;
1486         pr->tx_packets = tx_packets;
1487         pr->rx_bytes = rx_bytes;
1488         pr->rx_packets = rx_packets;
1489
1490         pr->port = port;
1491
1492         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1493         if (!pr->eq) {
1494                 pr_err("create_eq failed (eq)\n");
1495                 goto out_free;
1496         }
1497
1498         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1499                                      pr->eq->fw_handle,
1500                                      port->logical_port_id);
1501         if (!pr->recv_cq) {
1502                 pr_err("create_cq failed (cq_recv)\n");
1503                 goto out_free;
1504         }
1505
1506         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1507                                      pr->eq->fw_handle,
1508                                      port->logical_port_id);
1509         if (!pr->send_cq) {
1510                 pr_err("create_cq failed (cq_send)\n");
1511                 goto out_free;
1512         }
1513
1514         if (netif_msg_ifup(port))
1515                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1516                         pr->send_cq->attr.act_nr_of_cqes,
1517                         pr->recv_cq->attr.act_nr_of_cqes);
1518
1519         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1520         if (!init_attr) {
1521                 ret = -ENOMEM;
1522                 pr_err("no mem for ehea_qp_init_attr\n");
1523                 goto out_free;
1524         }
1525
1526         init_attr->low_lat_rq1 = 1;
1527         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1528         init_attr->rq_count = 3;
1529         init_attr->qp_token = queue_token;
1530         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1531         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1532         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1533         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1534         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1535         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1536         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1537         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1538         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1539         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1540         init_attr->port_nr = port->logical_port_id;
1541         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1542         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1543         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1544
1545         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1546         if (!pr->qp) {
1547                 pr_err("create_qp failed\n");
1548                 ret = -EIO;
1549                 goto out_free;
1550         }
1551
1552         if (netif_msg_ifup(port))
1553                 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1554                         init_attr->qp_nr,
1555                         init_attr->act_nr_send_wqes,
1556                         init_attr->act_nr_rwqes_rq1,
1557                         init_attr->act_nr_rwqes_rq2,
1558                         init_attr->act_nr_rwqes_rq3);
1559
1560         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1561
1562         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1563         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1564         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1565         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1566         if (ret)
1567                 goto out_free;
1568
1569         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1570         if (ehea_gen_smrs(pr) != 0) {
1571                 ret = -EIO;
1572                 goto out_free;
1573         }
1574
1575         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1576
1577         kfree(init_attr);
1578
1579         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1580
1581         ret = 0;
1582         goto out;
1583
1584 out_free:
1585         kfree(init_attr);
1586         vfree(pr->sq_skba.arr);
1587         vfree(pr->rq1_skba.arr);
1588         vfree(pr->rq2_skba.arr);
1589         vfree(pr->rq3_skba.arr);
1590         ehea_destroy_qp(pr->qp);
1591         ehea_destroy_cq(pr->send_cq);
1592         ehea_destroy_cq(pr->recv_cq);
1593         ehea_destroy_eq(pr->eq);
1594 out:
1595         return ret;
1596 }
1597
1598 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1599 {
1600         int ret, i;
1601
1602         if (pr->qp)
1603                 netif_napi_del(&pr->napi);
1604
1605         ret = ehea_destroy_qp(pr->qp);
1606
1607         if (!ret) {
1608                 ehea_destroy_cq(pr->send_cq);
1609                 ehea_destroy_cq(pr->recv_cq);
1610                 ehea_destroy_eq(pr->eq);
1611
1612                 for (i = 0; i < pr->rq1_skba.len; i++)
1613                         if (pr->rq1_skba.arr[i])
1614                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1615
1616                 for (i = 0; i < pr->rq2_skba.len; i++)
1617                         if (pr->rq2_skba.arr[i])
1618                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1619
1620                 for (i = 0; i < pr->rq3_skba.len; i++)
1621                         if (pr->rq3_skba.arr[i])
1622                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1623
1624                 for (i = 0; i < pr->sq_skba.len; i++)
1625                         if (pr->sq_skba.arr[i])
1626                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1627
1628                 vfree(pr->rq1_skba.arr);
1629                 vfree(pr->rq2_skba.arr);
1630                 vfree(pr->rq3_skba.arr);
1631                 vfree(pr->sq_skba.arr);
1632                 ret = ehea_rem_smrs(pr);
1633         }
1634         return ret;
1635 }
1636
1637 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1638                                   u32 lkey)
1639 {
1640         int skb_data_size = skb_headlen(skb);
1641         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1642         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1643         unsigned int immediate_len = SWQE2_MAX_IMM;
1644
1645         swqe->descriptors = 0;
1646
1647         if (skb_is_gso(skb)) {
1648                 swqe->tx_control |= EHEA_SWQE_TSO;
1649                 swqe->mss = skb_shinfo(skb)->gso_size;
1650                 /*
1651                  * For TSO packets we only copy the headers into the
1652                  * immediate area.
1653                  */
1654                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1655         }
1656
1657         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1658                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1659                 swqe->immediate_data_length = immediate_len;
1660
1661                 if (skb_data_size > immediate_len) {
1662                         sg1entry->l_key = lkey;
1663                         sg1entry->len = skb_data_size - immediate_len;
1664                         sg1entry->vaddr =
1665                                 ehea_map_vaddr(skb->data + immediate_len);
1666                         swqe->descriptors++;
1667                 }
1668         } else {
1669                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1670                 swqe->immediate_data_length = skb_data_size;
1671         }
1672 }
1673
1674 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1675                                     struct ehea_swqe *swqe, u32 lkey)
1676 {
1677         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1678         skb_frag_t *frag;
1679         int nfrags, sg1entry_contains_frag_data, i;
1680
1681         nfrags = skb_shinfo(skb)->nr_frags;
1682         sg1entry = &swqe->u.immdata_desc.sg_entry;
1683         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1684         sg1entry_contains_frag_data = 0;
1685
1686         write_swqe2_immediate(skb, swqe, lkey);
1687
1688         /* write descriptors */
1689         if (nfrags > 0) {
1690                 if (swqe->descriptors == 0) {
1691                         /* sg1entry not yet used */
1692                         frag = &skb_shinfo(skb)->frags[0];
1693
1694                         /* copy sg1entry data */
1695                         sg1entry->l_key = lkey;
1696                         sg1entry->len = skb_frag_size(frag);
1697                         sg1entry->vaddr =
1698                                 ehea_map_vaddr(skb_frag_address(frag));
1699                         swqe->descriptors++;
1700                         sg1entry_contains_frag_data = 1;
1701                 }
1702
1703                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1704
1705                         frag = &skb_shinfo(skb)->frags[i];
1706                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1707
1708                         sgentry->l_key = lkey;
1709                         sgentry->len = skb_frag_size(frag);
1710                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1711                         swqe->descriptors++;
1712                 }
1713         }
1714 }
1715
1716 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1717 {
1718         int ret = 0;
1719         u64 hret;
1720         u8 reg_type;
1721
1722         /* De/Register untagged packets */
1723         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1724         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1725                                      port->logical_port_id,
1726                                      reg_type, port->mac_addr, 0, hcallid);
1727         if (hret != H_SUCCESS) {
1728                 pr_err("%sregistering bc address failed (tagged)\n",
1729                        hcallid == H_REG_BCMC ? "" : "de");
1730                 ret = -EIO;
1731                 goto out_herr;
1732         }
1733
1734         /* De/Register VLAN packets */
1735         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1736         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1737                                      port->logical_port_id,
1738                                      reg_type, port->mac_addr, 0, hcallid);
1739         if (hret != H_SUCCESS) {
1740                 pr_err("%sregistering bc address failed (vlan)\n",
1741                        hcallid == H_REG_BCMC ? "" : "de");
1742                 ret = -EIO;
1743         }
1744 out_herr:
1745         return ret;
1746 }
1747
1748 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1749 {
1750         struct ehea_port *port = netdev_priv(dev);
1751         struct sockaddr *mac_addr = sa;
1752         struct hcp_ehea_port_cb0 *cb0;
1753         int ret;
1754         u64 hret;
1755
1756         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1757                 ret = -EADDRNOTAVAIL;
1758                 goto out;
1759         }
1760
1761         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1762         if (!cb0) {
1763                 pr_err("no mem for cb0\n");
1764                 ret = -ENOMEM;
1765                 goto out;
1766         }
1767
1768         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1769
1770         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1771
1772         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1773                                        port->logical_port_id, H_PORT_CB0,
1774                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1775         if (hret != H_SUCCESS) {
1776                 ret = -EIO;
1777                 goto out_free;
1778         }
1779
1780         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1781
1782         /* Deregister old MAC in pHYP */
1783         if (port->state == EHEA_PORT_UP) {
1784                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1785                 if (ret)
1786                         goto out_upregs;
1787         }
1788
1789         port->mac_addr = cb0->port_mac_addr << 16;
1790
1791         /* Register new MAC in pHYP */
1792         if (port->state == EHEA_PORT_UP) {
1793                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1794                 if (ret)
1795                         goto out_upregs;
1796         }
1797
1798         ret = 0;
1799
1800 out_upregs:
1801         ehea_update_bcmc_registrations();
1802 out_free:
1803         free_page((unsigned long)cb0);
1804 out:
1805         return ret;
1806 }
1807
1808 static void ehea_promiscuous_error(u64 hret, int enable)
1809 {
1810         if (hret == H_AUTHORITY)
1811                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1812                         enable == 1 ? "en" : "dis");
1813         else
1814                 pr_err("failed %sabling promiscuous mode\n",
1815                        enable == 1 ? "en" : "dis");
1816 }
1817
1818 static void ehea_promiscuous(struct net_device *dev, int enable)
1819 {
1820         struct ehea_port *port = netdev_priv(dev);
1821         struct hcp_ehea_port_cb7 *cb7;
1822         u64 hret;
1823
1824         if (enable == port->promisc)
1825                 return;
1826
1827         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1828         if (!cb7) {
1829                 pr_err("no mem for cb7\n");
1830                 goto out;
1831         }
1832
1833         /* Modify Pxs_DUCQPN in CB7 */
1834         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1835
1836         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1837                                        port->logical_port_id,
1838                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1839         if (hret) {
1840                 ehea_promiscuous_error(hret, enable);
1841                 goto out;
1842         }
1843
1844         port->promisc = enable;
1845 out:
1846         free_page((unsigned long)cb7);
1847 }
1848
1849 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1850                                      u32 hcallid)
1851 {
1852         u64 hret;
1853         u8 reg_type;
1854
1855         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1856         if (mc_mac_addr == 0)
1857                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1858
1859         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1860                                      port->logical_port_id,
1861                                      reg_type, mc_mac_addr, 0, hcallid);
1862         if (hret)
1863                 goto out;
1864
1865         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1866         if (mc_mac_addr == 0)
1867                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1868
1869         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1870                                      port->logical_port_id,
1871                                      reg_type, mc_mac_addr, 0, hcallid);
1872 out:
1873         return hret;
1874 }
1875
1876 static int ehea_drop_multicast_list(struct net_device *dev)
1877 {
1878         struct ehea_port *port = netdev_priv(dev);
1879         struct ehea_mc_list *mc_entry = port->mc_list;
1880         struct list_head *pos;
1881         struct list_head *temp;
1882         int ret = 0;
1883         u64 hret;
1884
1885         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1886                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1887
1888                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1889                                                  H_DEREG_BCMC);
1890                 if (hret) {
1891                         pr_err("failed deregistering mcast MAC\n");
1892                         ret = -EIO;
1893                 }
1894
1895                 list_del(pos);
1896                 kfree(mc_entry);
1897         }
1898         return ret;
1899 }
1900
1901 static void ehea_allmulti(struct net_device *dev, int enable)
1902 {
1903         struct ehea_port *port = netdev_priv(dev);
1904         u64 hret;
1905
1906         if (!port->allmulti) {
1907                 if (enable) {
1908                         /* Enable ALLMULTI */
1909                         ehea_drop_multicast_list(dev);
1910                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1911                         if (!hret)
1912                                 port->allmulti = 1;
1913                         else
1914                                 netdev_err(dev,
1915                                            "failed enabling IFF_ALLMULTI\n");
1916                 }
1917         } else {
1918                 if (!enable) {
1919                         /* Disable ALLMULTI */
1920                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1921                         if (!hret)
1922                                 port->allmulti = 0;
1923                         else
1924                                 netdev_err(dev,
1925                                            "failed disabling IFF_ALLMULTI\n");
1926                 }
1927         }
1928 }
1929
1930 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1931 {
1932         struct ehea_mc_list *ehea_mcl_entry;
1933         u64 hret;
1934
1935         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1936         if (!ehea_mcl_entry) {
1937                 pr_err("no mem for mcl_entry\n");
1938                 return;
1939         }
1940
1941         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1942
1943         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1944
1945         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1946                                          H_REG_BCMC);
1947         if (!hret)
1948                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1949         else {
1950                 pr_err("failed registering mcast MAC\n");
1951                 kfree(ehea_mcl_entry);
1952         }
1953 }
1954
1955 static void ehea_set_multicast_list(struct net_device *dev)
1956 {
1957         struct ehea_port *port = netdev_priv(dev);
1958         struct netdev_hw_addr *ha;
1959         int ret;
1960
1961         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1962
1963         if (dev->flags & IFF_ALLMULTI) {
1964                 ehea_allmulti(dev, 1);
1965                 goto out;
1966         }
1967         ehea_allmulti(dev, 0);
1968
1969         if (!netdev_mc_empty(dev)) {
1970                 ret = ehea_drop_multicast_list(dev);
1971                 if (ret) {
1972                         /* Dropping the current multicast list failed.
1973                          * Enabling ALL_MULTI is the best we can do.
1974                          */
1975                         ehea_allmulti(dev, 1);
1976                 }
1977
1978                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1979                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1980                                 port->adapter->max_mc_mac);
1981                         goto out;
1982                 }
1983
1984                 netdev_for_each_mc_addr(ha, dev)
1985                         ehea_add_multicast_entry(port, ha->addr);
1986
1987         }
1988 out:
1989         ehea_update_bcmc_registrations();
1990 }
1991
1992 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1993 {
1994         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1995                 return -EINVAL;
1996         dev->mtu = new_mtu;
1997         return 0;
1998 }
1999
2000 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
2001 {
2002         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
2003
2004         if (skb->protocol != htons(ETH_P_IP))
2005                 return;
2006
2007         if (skb->ip_summed == CHECKSUM_PARTIAL)
2008                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
2009
2010         swqe->ip_start = skb_network_offset(skb);
2011         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2012
2013         switch (ip_hdr(skb)->protocol) {
2014         case IPPROTO_UDP:
2015                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2016                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2017
2018                 swqe->tcp_offset = swqe->ip_end + 1 +
2019                                    offsetof(struct udphdr, check);
2020                 break;
2021
2022         case IPPROTO_TCP:
2023                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2024                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2025
2026                 swqe->tcp_offset = swqe->ip_end + 1 +
2027                                    offsetof(struct tcphdr, check);
2028                 break;
2029         }
2030 }
2031
2032 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2033                        struct ehea_swqe *swqe, u32 lkey)
2034 {
2035         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2036
2037         xmit_common(skb, swqe);
2038
2039         write_swqe2_data(skb, dev, swqe, lkey);
2040 }
2041
2042 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2043                        struct ehea_swqe *swqe)
2044 {
2045         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2046
2047         xmit_common(skb, swqe);
2048
2049         if (!skb->data_len)
2050                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2051         else
2052                 skb_copy_bits(skb, 0, imm_data, skb->len);
2053
2054         swqe->immediate_data_length = skb->len;
2055         dev_kfree_skb(skb);
2056 }
2057
2058 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2059 {
2060         struct ehea_port *port = netdev_priv(dev);
2061         struct ehea_swqe *swqe;
2062         u32 lkey;
2063         int swqe_index;
2064         struct ehea_port_res *pr;
2065         struct netdev_queue *txq;
2066
2067         pr = &port->port_res[skb_get_queue_mapping(skb)];
2068         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2069
2070         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2071         memset(swqe, 0, SWQE_HEADER_SIZE);
2072         atomic_dec(&pr->swqe_avail);
2073
2074         if (vlan_tx_tag_present(skb)) {
2075                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2076                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2077         }
2078
2079         pr->tx_packets++;
2080         pr->tx_bytes += skb->len;
2081
2082         if (skb->len <= SWQE3_MAX_IMM) {
2083                 u32 sig_iv = port->sig_comp_iv;
2084                 u32 swqe_num = pr->swqe_id_counter;
2085                 ehea_xmit3(skb, dev, swqe);
2086                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2087                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2088                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2089                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2090                                                       sig_iv);
2091                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2092                         pr->swqe_ll_count = 0;
2093                 } else
2094                         pr->swqe_ll_count += 1;
2095         } else {
2096                 swqe->wr_id =
2097                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2098                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2099                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2100                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2101                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2102
2103                 pr->sq_skba.index++;
2104                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2105
2106                 lkey = pr->send_mr.lkey;
2107                 ehea_xmit2(skb, dev, swqe, lkey);
2108                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2109         }
2110         pr->swqe_id_counter += 1;
2111
2112         netif_info(port, tx_queued, dev,
2113                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2114         if (netif_msg_tx_queued(port))
2115                 ehea_dump(swqe, 512, "swqe");
2116
2117         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2118                 netif_tx_stop_queue(txq);
2119                 swqe->tx_control |= EHEA_SWQE_PURGE;
2120         }
2121
2122         ehea_post_swqe(pr->qp, swqe);
2123
2124         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2125                 pr->p_stats.queue_stopped++;
2126                 netif_tx_stop_queue(txq);
2127         }
2128
2129         return NETDEV_TX_OK;
2130 }
2131
2132 static int ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2133 {
2134         struct ehea_port *port = netdev_priv(dev);
2135         struct ehea_adapter *adapter = port->adapter;
2136         struct hcp_ehea_port_cb1 *cb1;
2137         int index;
2138         u64 hret;
2139         int err = 0;
2140
2141         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2142         if (!cb1) {
2143                 pr_err("no mem for cb1\n");
2144                 err = -ENOMEM;
2145                 goto out;
2146         }
2147
2148         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2149                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2150         if (hret != H_SUCCESS) {
2151                 pr_err("query_ehea_port failed\n");
2152                 err = -EINVAL;
2153                 goto out;
2154         }
2155
2156         index = (vid / 64);
2157         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2158
2159         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2160                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2161         if (hret != H_SUCCESS) {
2162                 pr_err("modify_ehea_port failed\n");
2163                 err = -EINVAL;
2164         }
2165 out:
2166         free_page((unsigned long)cb1);
2167         return err;
2168 }
2169
2170 static int ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2171 {
2172         struct ehea_port *port = netdev_priv(dev);
2173         struct ehea_adapter *adapter = port->adapter;
2174         struct hcp_ehea_port_cb1 *cb1;
2175         int index;
2176         u64 hret;
2177         int err = 0;
2178
2179         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2180         if (!cb1) {
2181                 pr_err("no mem for cb1\n");
2182                 err = -ENOMEM;
2183                 goto out;
2184         }
2185
2186         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2187                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2188         if (hret != H_SUCCESS) {
2189                 pr_err("query_ehea_port failed\n");
2190                 err = -EINVAL;
2191                 goto out;
2192         }
2193
2194         index = (vid / 64);
2195         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2196
2197         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2198                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2199         if (hret != H_SUCCESS) {
2200                 pr_err("modify_ehea_port failed\n");
2201                 err = -EINVAL;
2202         }
2203 out:
2204         free_page((unsigned long)cb1);
2205         return err;
2206 }
2207
2208 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2209 {
2210         int ret = -EIO;
2211         u64 hret;
2212         u16 dummy16 = 0;
2213         u64 dummy64 = 0;
2214         struct hcp_modify_qp_cb0 *cb0;
2215
2216         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2217         if (!cb0) {
2218                 ret = -ENOMEM;
2219                 goto out;
2220         }
2221
2222         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2223                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2224         if (hret != H_SUCCESS) {
2225                 pr_err("query_ehea_qp failed (1)\n");
2226                 goto out;
2227         }
2228
2229         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2230         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2231                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2232                                      &dummy64, &dummy64, &dummy16, &dummy16);
2233         if (hret != H_SUCCESS) {
2234                 pr_err("modify_ehea_qp failed (1)\n");
2235                 goto out;
2236         }
2237
2238         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2239                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2240         if (hret != H_SUCCESS) {
2241                 pr_err("query_ehea_qp failed (2)\n");
2242                 goto out;
2243         }
2244
2245         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2246         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2247                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2248                                      &dummy64, &dummy64, &dummy16, &dummy16);
2249         if (hret != H_SUCCESS) {
2250                 pr_err("modify_ehea_qp failed (2)\n");
2251                 goto out;
2252         }
2253
2254         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2255                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2256         if (hret != H_SUCCESS) {
2257                 pr_err("query_ehea_qp failed (3)\n");
2258                 goto out;
2259         }
2260
2261         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2262         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2263                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2264                                      &dummy64, &dummy64, &dummy16, &dummy16);
2265         if (hret != H_SUCCESS) {
2266                 pr_err("modify_ehea_qp failed (3)\n");
2267                 goto out;
2268         }
2269
2270         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2271                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2272         if (hret != H_SUCCESS) {
2273                 pr_err("query_ehea_qp failed (4)\n");
2274                 goto out;
2275         }
2276
2277         ret = 0;
2278 out:
2279         free_page((unsigned long)cb0);
2280         return ret;
2281 }
2282
2283 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2284 {
2285         int ret, i;
2286         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2287         enum ehea_eq_type eq_type = EHEA_EQ;
2288
2289         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2290                                    EHEA_MAX_ENTRIES_EQ, 1);
2291         if (!port->qp_eq) {
2292                 ret = -EINVAL;
2293                 pr_err("ehea_create_eq failed (qp_eq)\n");
2294                 goto out_kill_eq;
2295         }
2296
2297         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2298         pr_cfg.max_entries_scq = sq_entries * 2;
2299         pr_cfg.max_entries_sq = sq_entries;
2300         pr_cfg.max_entries_rq1 = rq1_entries;
2301         pr_cfg.max_entries_rq2 = rq2_entries;
2302         pr_cfg.max_entries_rq3 = rq3_entries;
2303
2304         pr_cfg_small_rx.max_entries_rcq = 1;
2305         pr_cfg_small_rx.max_entries_scq = sq_entries;
2306         pr_cfg_small_rx.max_entries_sq = sq_entries;
2307         pr_cfg_small_rx.max_entries_rq1 = 1;
2308         pr_cfg_small_rx.max_entries_rq2 = 1;
2309         pr_cfg_small_rx.max_entries_rq3 = 1;
2310
2311         for (i = 0; i < def_qps; i++) {
2312                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2313                 if (ret)
2314                         goto out_clean_pr;
2315         }
2316         for (i = def_qps; i < def_qps; i++) {
2317                 ret = ehea_init_port_res(port, &port->port_res[i],
2318                                          &pr_cfg_small_rx, i);
2319                 if (ret)
2320                         goto out_clean_pr;
2321         }
2322
2323         return 0;
2324
2325 out_clean_pr:
2326         while (--i >= 0)
2327                 ehea_clean_portres(port, &port->port_res[i]);
2328
2329 out_kill_eq:
2330         ehea_destroy_eq(port->qp_eq);
2331         return ret;
2332 }
2333
2334 static int ehea_clean_all_portres(struct ehea_port *port)
2335 {
2336         int ret = 0;
2337         int i;
2338
2339         for (i = 0; i < port->num_def_qps; i++)
2340                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2341
2342         ret |= ehea_destroy_eq(port->qp_eq);
2343
2344         return ret;
2345 }
2346
2347 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2348 {
2349         if (adapter->active_ports)
2350                 return;
2351
2352         ehea_rem_mr(&adapter->mr);
2353 }
2354
2355 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2356 {
2357         if (adapter->active_ports)
2358                 return 0;
2359
2360         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2361 }
2362
2363 static int ehea_up(struct net_device *dev)
2364 {
2365         int ret, i;
2366         struct ehea_port *port = netdev_priv(dev);
2367
2368         if (port->state == EHEA_PORT_UP)
2369                 return 0;
2370
2371         ret = ehea_port_res_setup(port, port->num_def_qps);
2372         if (ret) {
2373                 netdev_err(dev, "port_res_failed\n");
2374                 goto out;
2375         }
2376
2377         /* Set default QP for this port */
2378         ret = ehea_configure_port(port);
2379         if (ret) {
2380                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2381                 goto out_clean_pr;
2382         }
2383
2384         ret = ehea_reg_interrupts(dev);
2385         if (ret) {
2386                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2387                 goto out_clean_pr;
2388         }
2389
2390         for (i = 0; i < port->num_def_qps; i++) {
2391                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2392                 if (ret) {
2393                         netdev_err(dev, "activate_qp failed\n");
2394                         goto out_free_irqs;
2395                 }
2396         }
2397
2398         for (i = 0; i < port->num_def_qps; i++) {
2399                 ret = ehea_fill_port_res(&port->port_res[i]);
2400                 if (ret) {
2401                         netdev_err(dev, "out_free_irqs\n");
2402                         goto out_free_irqs;
2403                 }
2404         }
2405
2406         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2407         if (ret) {
2408                 ret = -EIO;
2409                 goto out_free_irqs;
2410         }
2411
2412         port->state = EHEA_PORT_UP;
2413
2414         ret = 0;
2415         goto out;
2416
2417 out_free_irqs:
2418         ehea_free_interrupts(dev);
2419
2420 out_clean_pr:
2421         ehea_clean_all_portres(port);
2422 out:
2423         if (ret)
2424                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2425
2426         ehea_update_bcmc_registrations();
2427         ehea_update_firmware_handles();
2428
2429         return ret;
2430 }
2431
2432 static void port_napi_disable(struct ehea_port *port)
2433 {
2434         int i;
2435
2436         for (i = 0; i < port->num_def_qps; i++)
2437                 napi_disable(&port->port_res[i].napi);
2438 }
2439
2440 static void port_napi_enable(struct ehea_port *port)
2441 {
2442         int i;
2443
2444         for (i = 0; i < port->num_def_qps; i++)
2445                 napi_enable(&port->port_res[i].napi);
2446 }
2447
2448 static int ehea_open(struct net_device *dev)
2449 {
2450         int ret;
2451         struct ehea_port *port = netdev_priv(dev);
2452
2453         mutex_lock(&port->port_lock);
2454
2455         netif_info(port, ifup, dev, "enabling port\n");
2456
2457         ret = ehea_up(dev);
2458         if (!ret) {
2459                 port_napi_enable(port);
2460                 netif_tx_start_all_queues(dev);
2461         }
2462
2463         mutex_unlock(&port->port_lock);
2464         schedule_delayed_work(&port->stats_work,
2465                               round_jiffies_relative(msecs_to_jiffies(1000)));
2466
2467         return ret;
2468 }
2469
2470 static int ehea_down(struct net_device *dev)
2471 {
2472         int ret;
2473         struct ehea_port *port = netdev_priv(dev);
2474
2475         if (port->state == EHEA_PORT_DOWN)
2476                 return 0;
2477
2478         ehea_drop_multicast_list(dev);
2479         ehea_allmulti(dev, 0);
2480         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2481
2482         ehea_free_interrupts(dev);
2483
2484         port->state = EHEA_PORT_DOWN;
2485
2486         ehea_update_bcmc_registrations();
2487
2488         ret = ehea_clean_all_portres(port);
2489         if (ret)
2490                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2491
2492         ehea_update_firmware_handles();
2493
2494         return ret;
2495 }
2496
2497 static int ehea_stop(struct net_device *dev)
2498 {
2499         int ret;
2500         struct ehea_port *port = netdev_priv(dev);
2501
2502         netif_info(port, ifdown, dev, "disabling port\n");
2503
2504         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2505         cancel_work_sync(&port->reset_task);
2506         cancel_delayed_work_sync(&port->stats_work);
2507         mutex_lock(&port->port_lock);
2508         netif_tx_stop_all_queues(dev);
2509         port_napi_disable(port);
2510         ret = ehea_down(dev);
2511         mutex_unlock(&port->port_lock);
2512         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2513         return ret;
2514 }
2515
2516 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2517 {
2518         struct ehea_qp qp = *orig_qp;
2519         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2520         struct ehea_swqe *swqe;
2521         int wqe_index;
2522         int i;
2523
2524         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2525                 swqe = ehea_get_swqe(&qp, &wqe_index);
2526                 swqe->tx_control |= EHEA_SWQE_PURGE;
2527         }
2528 }
2529
2530 static void ehea_flush_sq(struct ehea_port *port)
2531 {
2532         int i;
2533
2534         for (i = 0; i < port->num_def_qps; i++) {
2535                 struct ehea_port_res *pr = &port->port_res[i];
2536                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2537                 int ret;
2538
2539                 ret = wait_event_timeout(port->swqe_avail_wq,
2540                          atomic_read(&pr->swqe_avail) >= swqe_max,
2541                          msecs_to_jiffies(100));
2542
2543                 if (!ret) {
2544                         pr_err("WARNING: sq not flushed completely\n");
2545                         break;
2546                 }
2547         }
2548 }
2549
2550 static int ehea_stop_qps(struct net_device *dev)
2551 {
2552         struct ehea_port *port = netdev_priv(dev);
2553         struct ehea_adapter *adapter = port->adapter;
2554         struct hcp_modify_qp_cb0 *cb0;
2555         int ret = -EIO;
2556         int dret;
2557         int i;
2558         u64 hret;
2559         u64 dummy64 = 0;
2560         u16 dummy16 = 0;
2561
2562         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2563         if (!cb0) {
2564                 ret = -ENOMEM;
2565                 goto out;
2566         }
2567
2568         for (i = 0; i < (port->num_def_qps); i++) {
2569                 struct ehea_port_res *pr =  &port->port_res[i];
2570                 struct ehea_qp *qp = pr->qp;
2571
2572                 /* Purge send queue */
2573                 ehea_purge_sq(qp);
2574
2575                 /* Disable queue pair */
2576                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2577                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2578                                             cb0);
2579                 if (hret != H_SUCCESS) {
2580                         pr_err("query_ehea_qp failed (1)\n");
2581                         goto out;
2582                 }
2583
2584                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2585                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2586
2587                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2588                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2589                                                             1), cb0, &dummy64,
2590                                              &dummy64, &dummy16, &dummy16);
2591                 if (hret != H_SUCCESS) {
2592                         pr_err("modify_ehea_qp failed (1)\n");
2593                         goto out;
2594                 }
2595
2596                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2597                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2598                                             cb0);
2599                 if (hret != H_SUCCESS) {
2600                         pr_err("query_ehea_qp failed (2)\n");
2601                         goto out;
2602                 }
2603
2604                 /* deregister shared memory regions */
2605                 dret = ehea_rem_smrs(pr);
2606                 if (dret) {
2607                         pr_err("unreg shared memory region failed\n");
2608                         goto out;
2609                 }
2610         }
2611
2612         ret = 0;
2613 out:
2614         free_page((unsigned long)cb0);
2615
2616         return ret;
2617 }
2618
2619 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2620 {
2621         struct ehea_qp qp = *orig_qp;
2622         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2623         struct ehea_rwqe *rwqe;
2624         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2625         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2626         struct sk_buff *skb;
2627         u32 lkey = pr->recv_mr.lkey;
2628
2629
2630         int i;
2631         int index;
2632
2633         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2634                 rwqe = ehea_get_next_rwqe(&qp, 2);
2635                 rwqe->sg_list[0].l_key = lkey;
2636                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2637                 skb = skba_rq2[index];
2638                 if (skb)
2639                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2640         }
2641
2642         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2643                 rwqe = ehea_get_next_rwqe(&qp, 3);
2644                 rwqe->sg_list[0].l_key = lkey;
2645                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2646                 skb = skba_rq3[index];
2647                 if (skb)
2648                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2649         }
2650 }
2651
2652 static int ehea_restart_qps(struct net_device *dev)
2653 {
2654         struct ehea_port *port = netdev_priv(dev);
2655         struct ehea_adapter *adapter = port->adapter;
2656         int ret = 0;
2657         int i;
2658
2659         struct hcp_modify_qp_cb0 *cb0;
2660         u64 hret;
2661         u64 dummy64 = 0;
2662         u16 dummy16 = 0;
2663
2664         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2665         if (!cb0) {
2666                 ret = -ENOMEM;
2667                 goto out;
2668         }
2669
2670         for (i = 0; i < (port->num_def_qps); i++) {
2671                 struct ehea_port_res *pr =  &port->port_res[i];
2672                 struct ehea_qp *qp = pr->qp;
2673
2674                 ret = ehea_gen_smrs(pr);
2675                 if (ret) {
2676                         netdev_err(dev, "creation of shared memory regions failed\n");
2677                         goto out;
2678                 }
2679
2680                 ehea_update_rqs(qp, pr);
2681
2682                 /* Enable queue pair */
2683                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2684                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2685                                             cb0);
2686                 if (hret != H_SUCCESS) {
2687                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2688                         goto out;
2689                 }
2690
2691                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2692                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2693
2694                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2695                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2696                                                             1), cb0, &dummy64,
2697                                              &dummy64, &dummy16, &dummy16);
2698                 if (hret != H_SUCCESS) {
2699                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2700                         goto out;
2701                 }
2702
2703                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2704                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2705                                             cb0);
2706                 if (hret != H_SUCCESS) {
2707                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2708                         goto out;
2709                 }
2710
2711                 /* refill entire queue */
2712                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2713                 ehea_refill_rq2(pr, 0);
2714                 ehea_refill_rq3(pr, 0);
2715         }
2716 out:
2717         free_page((unsigned long)cb0);
2718
2719         return ret;
2720 }
2721
2722 static void ehea_reset_port(struct work_struct *work)
2723 {
2724         int ret;
2725         struct ehea_port *port =
2726                 container_of(work, struct ehea_port, reset_task);
2727         struct net_device *dev = port->netdev;
2728
2729         mutex_lock(&dlpar_mem_lock);
2730         port->resets++;
2731         mutex_lock(&port->port_lock);
2732         netif_tx_disable(dev);
2733
2734         port_napi_disable(port);
2735
2736         ehea_down(dev);
2737
2738         ret = ehea_up(dev);
2739         if (ret)
2740                 goto out;
2741
2742         ehea_set_multicast_list(dev);
2743
2744         netif_info(port, timer, dev, "reset successful\n");
2745
2746         port_napi_enable(port);
2747
2748         netif_tx_wake_all_queues(dev);
2749 out:
2750         mutex_unlock(&port->port_lock);
2751         mutex_unlock(&dlpar_mem_lock);
2752 }
2753
2754 static void ehea_rereg_mrs(void)
2755 {
2756         int ret, i;
2757         struct ehea_adapter *adapter;
2758
2759         pr_info("LPAR memory changed - re-initializing driver\n");
2760
2761         list_for_each_entry(adapter, &adapter_list, list)
2762                 if (adapter->active_ports) {
2763                         /* Shutdown all ports */
2764                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2765                                 struct ehea_port *port = adapter->port[i];
2766                                 struct net_device *dev;
2767
2768                                 if (!port)
2769                                         continue;
2770
2771                                 dev = port->netdev;
2772
2773                                 if (dev->flags & IFF_UP) {
2774                                         mutex_lock(&port->port_lock);
2775                                         netif_tx_disable(dev);
2776                                         ehea_flush_sq(port);
2777                                         ret = ehea_stop_qps(dev);
2778                                         if (ret) {
2779                                                 mutex_unlock(&port->port_lock);
2780                                                 goto out;
2781                                         }
2782                                         port_napi_disable(port);
2783                                         mutex_unlock(&port->port_lock);
2784                                 }
2785                                 reset_sq_restart_flag(port);
2786                         }
2787
2788                         /* Unregister old memory region */
2789                         ret = ehea_rem_mr(&adapter->mr);
2790                         if (ret) {
2791                                 pr_err("unregister MR failed - driver inoperable!\n");
2792                                 goto out;
2793                         }
2794                 }
2795
2796         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2797
2798         list_for_each_entry(adapter, &adapter_list, list)
2799                 if (adapter->active_ports) {
2800                         /* Register new memory region */
2801                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2802                         if (ret) {
2803                                 pr_err("register MR failed - driver inoperable!\n");
2804                                 goto out;
2805                         }
2806
2807                         /* Restart all ports */
2808                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2809                                 struct ehea_port *port = adapter->port[i];
2810
2811                                 if (port) {
2812                                         struct net_device *dev = port->netdev;
2813
2814                                         if (dev->flags & IFF_UP) {
2815                                                 mutex_lock(&port->port_lock);
2816                                                 ret = ehea_restart_qps(dev);
2817                                                 if (!ret) {
2818                                                         check_sqs(port);
2819                                                         port_napi_enable(port);
2820                                                         netif_tx_wake_all_queues(dev);
2821                                                 } else {
2822                                                         netdev_err(dev, "Unable to restart QPS\n");
2823                                                 }
2824                                                 mutex_unlock(&port->port_lock);
2825                                         }
2826                                 }
2827                         }
2828                 }
2829         pr_info("re-initializing driver complete\n");
2830 out:
2831         return;
2832 }
2833
2834 static void ehea_tx_watchdog(struct net_device *dev)
2835 {
2836         struct ehea_port *port = netdev_priv(dev);
2837
2838         if (netif_carrier_ok(dev) &&
2839             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2840                 ehea_schedule_port_reset(port);
2841 }
2842
2843 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2844 {
2845         struct hcp_query_ehea *cb;
2846         u64 hret;
2847         int ret;
2848
2849         cb = (void *)get_zeroed_page(GFP_KERNEL);
2850         if (!cb) {
2851                 ret = -ENOMEM;
2852                 goto out;
2853         }
2854
2855         hret = ehea_h_query_ehea(adapter->handle, cb);
2856
2857         if (hret != H_SUCCESS) {
2858                 ret = -EIO;
2859                 goto out_herr;
2860         }
2861
2862         adapter->max_mc_mac = cb->max_mc_mac - 1;
2863         ret = 0;
2864
2865 out_herr:
2866         free_page((unsigned long)cb);
2867 out:
2868         return ret;
2869 }
2870
2871 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2872 {
2873         struct hcp_ehea_port_cb4 *cb4;
2874         u64 hret;
2875         int ret = 0;
2876
2877         *jumbo = 0;
2878
2879         /* (Try to) enable *jumbo frames */
2880         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2881         if (!cb4) {
2882                 pr_err("no mem for cb4\n");
2883                 ret = -ENOMEM;
2884                 goto out;
2885         } else {
2886                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2887                                               port->logical_port_id,
2888                                               H_PORT_CB4,
2889                                               H_PORT_CB4_JUMBO, cb4);
2890                 if (hret == H_SUCCESS) {
2891                         if (cb4->jumbo_frame)
2892                                 *jumbo = 1;
2893                         else {
2894                                 cb4->jumbo_frame = 1;
2895                                 hret = ehea_h_modify_ehea_port(port->adapter->
2896                                                                handle,
2897                                                                port->
2898                                                                logical_port_id,
2899                                                                H_PORT_CB4,
2900                                                                H_PORT_CB4_JUMBO,
2901                                                                cb4);
2902                                 if (hret == H_SUCCESS)
2903                                         *jumbo = 1;
2904                         }
2905                 } else
2906                         ret = -EINVAL;
2907
2908                 free_page((unsigned long)cb4);
2909         }
2910 out:
2911         return ret;
2912 }
2913
2914 static ssize_t ehea_show_port_id(struct device *dev,
2915                                  struct device_attribute *attr, char *buf)
2916 {
2917         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2918         return sprintf(buf, "%d", port->logical_port_id);
2919 }
2920
2921 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2922                    NULL);
2923
2924 static void __devinit logical_port_release(struct device *dev)
2925 {
2926         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2927         of_node_put(port->ofdev.dev.of_node);
2928 }
2929
2930 static struct device *ehea_register_port(struct ehea_port *port,
2931                                          struct device_node *dn)
2932 {
2933         int ret;
2934
2935         port->ofdev.dev.of_node = of_node_get(dn);
2936         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2937         port->ofdev.dev.bus = &ibmebus_bus_type;
2938
2939         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2940         port->ofdev.dev.release = logical_port_release;
2941
2942         ret = of_device_register(&port->ofdev);
2943         if (ret) {
2944                 pr_err("failed to register device. ret=%d\n", ret);
2945                 goto out;
2946         }
2947
2948         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2949         if (ret) {
2950                 pr_err("failed to register attributes, ret=%d\n", ret);
2951                 goto out_unreg_of_dev;
2952         }
2953
2954         return &port->ofdev.dev;
2955
2956 out_unreg_of_dev:
2957         of_device_unregister(&port->ofdev);
2958 out:
2959         return NULL;
2960 }
2961
2962 static void ehea_unregister_port(struct ehea_port *port)
2963 {
2964         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2965         of_device_unregister(&port->ofdev);
2966 }
2967
2968 static const struct net_device_ops ehea_netdev_ops = {
2969         .ndo_open               = ehea_open,
2970         .ndo_stop               = ehea_stop,
2971         .ndo_start_xmit         = ehea_start_xmit,
2972 #ifdef CONFIG_NET_POLL_CONTROLLER
2973         .ndo_poll_controller    = ehea_netpoll,
2974 #endif
2975         .ndo_get_stats64        = ehea_get_stats64,
2976         .ndo_set_mac_address    = ehea_set_mac_addr,
2977         .ndo_validate_addr      = eth_validate_addr,
2978         .ndo_set_rx_mode        = ehea_set_multicast_list,
2979         .ndo_change_mtu         = ehea_change_mtu,
2980         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2981         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2982         .ndo_tx_timeout         = ehea_tx_watchdog,
2983 };
2984
2985 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2986                                          u32 logical_port_id,
2987                                          struct device_node *dn)
2988 {
2989         int ret;
2990         struct net_device *dev;
2991         struct ehea_port *port;
2992         struct device *port_dev;
2993         int jumbo;
2994
2995         /* allocate memory for the port structures */
2996         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2997
2998         if (!dev) {
2999                 ret = -ENOMEM;
3000                 goto out_err;
3001         }
3002
3003         port = netdev_priv(dev);
3004
3005         mutex_init(&port->port_lock);
3006         port->state = EHEA_PORT_DOWN;
3007         port->sig_comp_iv = sq_entries / 10;
3008
3009         port->adapter = adapter;
3010         port->netdev = dev;
3011         port->logical_port_id = logical_port_id;
3012
3013         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3014
3015         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3016         if (!port->mc_list) {
3017                 ret = -ENOMEM;
3018                 goto out_free_ethdev;
3019         }
3020
3021         INIT_LIST_HEAD(&port->mc_list->list);
3022
3023         ret = ehea_sense_port_attr(port);
3024         if (ret)
3025                 goto out_free_mc_list;
3026
3027         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3028         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3029
3030         port_dev = ehea_register_port(port, dn);
3031         if (!port_dev)
3032                 goto out_free_mc_list;
3033
3034         SET_NETDEV_DEV(dev, port_dev);
3035
3036         /* initialize net_device structure */
3037         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3038
3039         dev->netdev_ops = &ehea_netdev_ops;
3040         ehea_set_ethtool_ops(dev);
3041
3042         dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3043                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3044         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3045                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3046                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3047                       | NETIF_F_RXCSUM;
3048         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3049                         NETIF_F_IP_CSUM;
3050         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3051
3052         INIT_WORK(&port->reset_task, ehea_reset_port);
3053         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3054
3055         init_waitqueue_head(&port->swqe_avail_wq);
3056         init_waitqueue_head(&port->restart_wq);
3057
3058         memset(&port->stats, 0, sizeof(struct net_device_stats));
3059         ret = register_netdev(dev);
3060         if (ret) {
3061                 pr_err("register_netdev failed. ret=%d\n", ret);
3062                 goto out_unreg_port;
3063         }
3064
3065         ret = ehea_get_jumboframe_status(port, &jumbo);
3066         if (ret)
3067                 netdev_err(dev, "failed determining jumbo frame status\n");
3068
3069         netdev_info(dev, "Jumbo frames are %sabled\n",
3070                     jumbo == 1 ? "en" : "dis");
3071
3072         adapter->active_ports++;
3073
3074         return port;
3075
3076 out_unreg_port:
3077         ehea_unregister_port(port);
3078
3079 out_free_mc_list:
3080         kfree(port->mc_list);
3081
3082 out_free_ethdev:
3083         free_netdev(dev);
3084
3085 out_err:
3086         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3087                logical_port_id, ret);
3088         return NULL;
3089 }
3090
3091 static void ehea_shutdown_single_port(struct ehea_port *port)
3092 {
3093         struct ehea_adapter *adapter = port->adapter;
3094
3095         cancel_work_sync(&port->reset_task);
3096         cancel_delayed_work_sync(&port->stats_work);
3097         unregister_netdev(port->netdev);
3098         ehea_unregister_port(port);
3099         kfree(port->mc_list);
3100         free_netdev(port->netdev);
3101         adapter->active_ports--;
3102 }
3103
3104 static int ehea_setup_ports(struct ehea_adapter *adapter)
3105 {
3106         struct device_node *lhea_dn;
3107         struct device_node *eth_dn = NULL;
3108
3109         const u32 *dn_log_port_id;
3110         int i = 0;
3111
3112         lhea_dn = adapter->ofdev->dev.of_node;
3113         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3114
3115                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3116                                                  NULL);
3117                 if (!dn_log_port_id) {
3118                         pr_err("bad device node: eth_dn name=%s\n",
3119                                eth_dn->full_name);
3120                         continue;
3121                 }
3122
3123                 if (ehea_add_adapter_mr(adapter)) {
3124                         pr_err("creating MR failed\n");
3125                         of_node_put(eth_dn);
3126                         return -EIO;
3127                 }
3128
3129                 adapter->port[i] = ehea_setup_single_port(adapter,
3130                                                           *dn_log_port_id,
3131                                                           eth_dn);
3132                 if (adapter->port[i])
3133                         netdev_info(adapter->port[i]->netdev,
3134                                     "logical port id #%d\n", *dn_log_port_id);
3135                 else
3136                         ehea_remove_adapter_mr(adapter);
3137
3138                 i++;
3139         }
3140         return 0;
3141 }
3142
3143 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3144                                            u32 logical_port_id)
3145 {
3146         struct device_node *lhea_dn;
3147         struct device_node *eth_dn = NULL;
3148         const u32 *dn_log_port_id;
3149
3150         lhea_dn = adapter->ofdev->dev.of_node;
3151         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3152
3153                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3154                                                  NULL);
3155                 if (dn_log_port_id)
3156                         if (*dn_log_port_id == logical_port_id)
3157                                 return eth_dn;
3158         }
3159
3160         return NULL;
3161 }
3162
3163 static ssize_t ehea_probe_port(struct device *dev,
3164                                struct device_attribute *attr,
3165                                const char *buf, size_t count)
3166 {
3167         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3168         struct ehea_port *port;
3169         struct device_node *eth_dn = NULL;
3170         int i;
3171
3172         u32 logical_port_id;
3173
3174         sscanf(buf, "%d", &logical_port_id);
3175
3176         port = ehea_get_port(adapter, logical_port_id);
3177
3178         if (port) {
3179                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3180                             logical_port_id);
3181                 return -EINVAL;
3182         }
3183
3184         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3185
3186         if (!eth_dn) {
3187                 pr_info("no logical port with id %d found\n", logical_port_id);
3188                 return -EINVAL;
3189         }
3190
3191         if (ehea_add_adapter_mr(adapter)) {
3192                 pr_err("creating MR failed\n");
3193                 return -EIO;
3194         }
3195
3196         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3197
3198         of_node_put(eth_dn);
3199
3200         if (port) {
3201                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3202                         if (!adapter->port[i]) {
3203                                 adapter->port[i] = port;
3204                                 break;
3205                         }
3206
3207                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3208                             logical_port_id);
3209         } else {
3210                 ehea_remove_adapter_mr(adapter);
3211                 return -EIO;
3212         }
3213
3214         return (ssize_t) count;
3215 }
3216
3217 static ssize_t ehea_remove_port(struct device *dev,
3218                                 struct device_attribute *attr,
3219                                 const char *buf, size_t count)
3220 {
3221         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3222         struct ehea_port *port;
3223         int i;
3224         u32 logical_port_id;
3225
3226         sscanf(buf, "%d", &logical_port_id);
3227
3228         port = ehea_get_port(adapter, logical_port_id);
3229
3230         if (port) {
3231                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3232                             logical_port_id);
3233
3234                 ehea_shutdown_single_port(port);
3235
3236                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3237                         if (adapter->port[i] == port) {
3238                                 adapter->port[i] = NULL;
3239                                 break;
3240                         }
3241         } else {
3242                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3243                        logical_port_id);
3244                 return -EINVAL;
3245         }
3246
3247         ehea_remove_adapter_mr(adapter);
3248
3249         return (ssize_t) count;
3250 }
3251
3252 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3253 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3254
3255 static int ehea_create_device_sysfs(struct platform_device *dev)
3256 {
3257         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3258         if (ret)
3259                 goto out;
3260
3261         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3262 out:
3263         return ret;
3264 }
3265
3266 static void ehea_remove_device_sysfs(struct platform_device *dev)
3267 {
3268         device_remove_file(&dev->dev, &dev_attr_probe_port);
3269         device_remove_file(&dev->dev, &dev_attr_remove_port);
3270 }
3271
3272 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3273                                         const struct of_device_id *id)
3274 {
3275         struct ehea_adapter *adapter;
3276         const u64 *adapter_handle;
3277         int ret;
3278         int i;
3279
3280         if (!dev || !dev->dev.of_node) {
3281                 pr_err("Invalid ibmebus device probed\n");
3282                 return -EINVAL;
3283         }
3284
3285         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3286         if (!adapter) {
3287                 ret = -ENOMEM;
3288                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3289                 goto out;
3290         }
3291
3292         list_add(&adapter->list, &adapter_list);
3293
3294         adapter->ofdev = dev;
3295
3296         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3297                                          NULL);
3298         if (adapter_handle)
3299                 adapter->handle = *adapter_handle;
3300
3301         if (!adapter->handle) {
3302                 dev_err(&dev->dev, "failed getting handle for adapter"
3303                         " '%s'\n", dev->dev.of_node->full_name);
3304                 ret = -ENODEV;
3305                 goto out_free_ad;
3306         }
3307
3308         adapter->pd = EHEA_PD_ID;
3309
3310         dev_set_drvdata(&dev->dev, adapter);
3311
3312
3313         /* initialize adapter and ports */
3314         /* get adapter properties */
3315         ret = ehea_sense_adapter_attr(adapter);
3316         if (ret) {
3317                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3318                 goto out_free_ad;
3319         }
3320
3321         adapter->neq = ehea_create_eq(adapter,
3322                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3323         if (!adapter->neq) {
3324                 ret = -EIO;
3325                 dev_err(&dev->dev, "NEQ creation failed\n");
3326                 goto out_free_ad;
3327         }
3328
3329         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3330                      (unsigned long)adapter);
3331
3332         ret = ehea_create_device_sysfs(dev);
3333         if (ret)
3334                 goto out_kill_eq;
3335
3336         ret = ehea_setup_ports(adapter);
3337         if (ret) {
3338                 dev_err(&dev->dev, "setup_ports failed\n");
3339                 goto out_rem_dev_sysfs;
3340         }
3341
3342         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3343                                   ehea_interrupt_neq, IRQF_DISABLED,
3344                                   "ehea_neq", adapter);
3345         if (ret) {
3346                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3347                 goto out_shutdown_ports;
3348         }
3349
3350         /* Handle any events that might be pending. */
3351         tasklet_hi_schedule(&adapter->neq_tasklet);
3352
3353         ret = 0;
3354         goto out;
3355
3356 out_shutdown_ports:
3357         for (i = 0; i < EHEA_MAX_PORTS; i++)
3358                 if (adapter->port[i]) {
3359                         ehea_shutdown_single_port(adapter->port[i]);
3360                         adapter->port[i] = NULL;
3361                 }
3362
3363 out_rem_dev_sysfs:
3364         ehea_remove_device_sysfs(dev);
3365
3366 out_kill_eq:
3367         ehea_destroy_eq(adapter->neq);
3368
3369 out_free_ad:
3370         list_del(&adapter->list);
3371         kfree(adapter);
3372
3373 out:
3374         ehea_update_firmware_handles();
3375
3376         return ret;
3377 }
3378
3379 static int __devexit ehea_remove(struct platform_device *dev)
3380 {
3381         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3382         int i;
3383
3384         for (i = 0; i < EHEA_MAX_PORTS; i++)
3385                 if (adapter->port[i]) {
3386                         ehea_shutdown_single_port(adapter->port[i]);
3387                         adapter->port[i] = NULL;
3388                 }
3389
3390         ehea_remove_device_sysfs(dev);
3391
3392         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3393         tasklet_kill(&adapter->neq_tasklet);
3394
3395         ehea_destroy_eq(adapter->neq);
3396         ehea_remove_adapter_mr(adapter);
3397         list_del(&adapter->list);
3398         kfree(adapter);
3399
3400         ehea_update_firmware_handles();
3401
3402         return 0;
3403 }
3404
3405 static void ehea_crash_handler(void)
3406 {
3407         int i;
3408
3409         if (ehea_fw_handles.arr)
3410                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3411                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3412                                              ehea_fw_handles.arr[i].fwh,
3413                                              FORCE_FREE);
3414
3415         if (ehea_bcmc_regs.arr)
3416                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3417                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3418                                               ehea_bcmc_regs.arr[i].port_id,
3419                                               ehea_bcmc_regs.arr[i].reg_type,
3420                                               ehea_bcmc_regs.arr[i].macaddr,
3421                                               0, H_DEREG_BCMC);
3422 }
3423
3424 static int ehea_mem_notifier(struct notifier_block *nb,
3425                              unsigned long action, void *data)
3426 {
3427         int ret = NOTIFY_BAD;
3428         struct memory_notify *arg = data;
3429
3430         mutex_lock(&dlpar_mem_lock);
3431
3432         switch (action) {
3433         case MEM_CANCEL_OFFLINE:
3434                 pr_info("memory offlining canceled");
3435                 /* Readd canceled memory block */
3436         case MEM_ONLINE:
3437                 pr_info("memory is going online");
3438                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3439                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3440                         goto out_unlock;
3441                 ehea_rereg_mrs();
3442                 break;
3443         case MEM_GOING_OFFLINE:
3444                 pr_info("memory is going offline");
3445                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3446                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3447                         goto out_unlock;
3448                 ehea_rereg_mrs();
3449                 break;
3450         default:
3451                 break;
3452         }
3453
3454         ehea_update_firmware_handles();
3455         ret = NOTIFY_OK;
3456
3457 out_unlock:
3458         mutex_unlock(&dlpar_mem_lock);
3459         return ret;
3460 }
3461
3462 static struct notifier_block ehea_mem_nb = {
3463         .notifier_call = ehea_mem_notifier,
3464 };
3465
3466 static int ehea_reboot_notifier(struct notifier_block *nb,
3467                                 unsigned long action, void *unused)
3468 {
3469         if (action == SYS_RESTART) {
3470                 pr_info("Reboot: freeing all eHEA resources\n");
3471                 ibmebus_unregister_driver(&ehea_driver);
3472         }
3473         return NOTIFY_DONE;
3474 }
3475
3476 static struct notifier_block ehea_reboot_nb = {
3477         .notifier_call = ehea_reboot_notifier,
3478 };
3479
3480 static int check_module_parm(void)
3481 {
3482         int ret = 0;
3483
3484         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3485             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3486                 pr_info("Bad parameter: rq1_entries\n");
3487                 ret = -EINVAL;
3488         }
3489         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3490             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3491                 pr_info("Bad parameter: rq2_entries\n");
3492                 ret = -EINVAL;
3493         }
3494         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3495             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3496                 pr_info("Bad parameter: rq3_entries\n");
3497                 ret = -EINVAL;
3498         }
3499         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3500             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3501                 pr_info("Bad parameter: sq_entries\n");
3502                 ret = -EINVAL;
3503         }
3504
3505         return ret;
3506 }
3507
3508 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3509                                       char *buf)
3510 {
3511         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3512 }
3513
3514 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3515                    ehea_show_capabilities, NULL);
3516
3517 static int __init ehea_module_init(void)
3518 {
3519         int ret;
3520
3521         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3522
3523         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3524         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3525
3526         mutex_init(&ehea_fw_handles.lock);
3527         spin_lock_init(&ehea_bcmc_regs.lock);
3528
3529         ret = check_module_parm();
3530         if (ret)
3531                 goto out;
3532
3533         ret = ehea_create_busmap();
3534         if (ret)
3535                 goto out;
3536
3537         ret = register_reboot_notifier(&ehea_reboot_nb);
3538         if (ret)
3539                 pr_info("failed registering reboot notifier\n");
3540
3541         ret = register_memory_notifier(&ehea_mem_nb);
3542         if (ret)
3543                 pr_info("failed registering memory remove notifier\n");
3544
3545         ret = crash_shutdown_register(ehea_crash_handler);
3546         if (ret)
3547                 pr_info("failed registering crash handler\n");
3548
3549         ret = ibmebus_register_driver(&ehea_driver);
3550         if (ret) {
3551                 pr_err("failed registering eHEA device driver on ebus\n");
3552                 goto out2;
3553         }
3554
3555         ret = driver_create_file(&ehea_driver.driver,
3556                                  &driver_attr_capabilities);
3557         if (ret) {
3558                 pr_err("failed to register capabilities attribute, ret=%d\n",
3559                        ret);
3560                 goto out3;
3561         }
3562
3563         return ret;
3564
3565 out3:
3566         ibmebus_unregister_driver(&ehea_driver);
3567 out2:
3568         unregister_memory_notifier(&ehea_mem_nb);
3569         unregister_reboot_notifier(&ehea_reboot_nb);
3570         crash_shutdown_unregister(ehea_crash_handler);
3571 out:
3572         return ret;
3573 }
3574
3575 static void __exit ehea_module_exit(void)
3576 {
3577         int ret;
3578
3579         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3580         ibmebus_unregister_driver(&ehea_driver);
3581         unregister_reboot_notifier(&ehea_reboot_nb);
3582         ret = crash_shutdown_unregister(ehea_crash_handler);
3583         if (ret)
3584                 pr_info("failed unregistering crash handler\n");
3585         unregister_memory_notifier(&ehea_mem_nb);
3586         kfree(ehea_fw_handles.arr);
3587         kfree(ehea_bcmc_regs.arr);
3588         ehea_destroy_busmap();
3589 }
3590
3591 module_init(ehea_module_init);
3592 module_exit(ehea_module_exit);